M3 Socket Countersunk Screws (DIN 7991) - Stainless Steel (A2)

Length (L): 4mm
Pack Quantity: Pack of 1
Sale price£0.66
In stock (5 units), ready to be shipped


M3 Socket Countersunk Screws (DIN 7991) in Stainless Steel (A2) are another type of screws with specific characteristics:

  1. M3: This is the metric thread size of the screw, indicating a 3-millimeter diameter.

  2. Socket: These screws feature a socket (hexagonal) drive, requiring a hex key or Allen wrench for installation and removal. The socket drive design provides a secure and efficient way to apply torque.

  3. Countersunk: Countersunk screws have a conical head with a flat top, allowing them to sit flush with the surface when installed, providing a clean and smooth finish.

  4. DIN 7991: This refers to the DIN specification that the screws conform to. DIN 7991 specifies the dimensions, tolerances, and other requirements for socket countersunk screws.

  5. Stainless Steel (A2): Stainless steel is a corrosion-resistant material, and A2 is a specific grade or alloy within the stainless steel family. In this context:

    • Stainless Steel: Stainless steel is highly resistant to corrosion, making it suitable for a wide range of applications, including those exposed to moisture, humidity, or chemicals.

    • A2: A2 stainless steel, also known as AISI 304, is a popular stainless steel grade. It is known for its excellent corrosion resistance, making it suitable for general-purpose applications. It contains about 18% chromium and 8% nickel, which contribute to its corrosion resistance properties.

Material Stainless Steel (A2)
Finish Natural
Manufacturing Standard DIN 7991
Screw Thread Pitch 0.5mm
Thread M3 (3mm), Right Hand Thread
Countersunk Angle (CA) 90 Degrees
Head Length [Max] (H) 1.86mm
Head Diameter [Max] (D) 6.72mm
Head Diameter [Min] (D) 5.54mm
Hexagon Across Flats / Allen Key Size (J)
Hexagon Depth (P)


For larger quantities or sizes not listed, please email frank@franksfasteners.co.uk and we will be happy to provide you with a quotation.

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